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  3. Deep inside a mountain near Sweatwater in East Tennessee is a body of water known as the Lost Sea. It is listed by the "Guinness

Deep inside a mountain near Sweatwater in East Tennessee is a body of water known as the Lost Sea. It is listed by the "Guinness

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问题 Deep inside a mountain near Sweatwater in East Tennessee is a body of water known as the Lost Sea. It is listed by the "Guinness Book of World Records" as the world’s largest underground lake. The lost Sea is part of an extensive and historical cave system called Craighead Caverns.
    The caverns have been known and used since the days of the Cherokee Indian Nation. The cave expands into a series of huge rooms from a small opening on the side of the mountain. Approximately one mile from the entrance, in a room called "the Council Room", many Indian artifacts have been found. Some of the items discovered include pottery, arrowheads, weapons and jewelry.
    For many years there were persistent rumors of a large underground lake somewhere in a cave, but it was not discovered until 1905. In that year, a thirteen-year-old boy named Ben Sands crawled through a small opening three hundred feet underground. He found himself in a large cave half filled with water.
    Today tourists visit the Lost Sea and ride far out onto it in glass-bottomed boats powered by electric motors. More than thirteen acres of water have been mapped out so far and still no end to the lake has been found. Even though teams of divers have tried to explore the Lost Sea, the full extent of it is still unknown.
According to the passage, the lost Sea is unique because it is ______.
选项 A、part of a historical cave system
B、the biggest underground lake in the world
C、listed in the "Guinness Book of World Records"
D、the largest body of water in Tennessee
答案B
解析 见第一段第2句，它作为世界上最大的地下湖而被载入《吉尼斯世界纪录大全》，这本书举世闻名，其结论具权威性
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